What is Snow?

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics,
but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in
significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as
it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.